From 067dfa35c6b2f15f82554f9eeb72b510df2e7218 Mon Sep 17 00:00:00 2001
From: Kris Austin <kris.austin@gmail.com>
Date: Sat, 5 Sep 2026 12:14:59 -0500
Subject: [PATCH] fix: make Windows debug builds work (#15353)

Co-authored-by: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
---
 deps/python3/python3.cmake               |  8 ++------
 deps/python3/stage_windows.cmake         | 20 +++-----------------
 src/CMakeLists.txt                       | 13 ++++++++++++-
 src/slic3r/plugin/PluginAuditManager.hpp |  3 ++-
 src/slic3r/plugin/PythonInterpreter.hpp  |  3 ++-
 5 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/deps/python3/python3.cmake b/deps/python3/python3.cmake
index e93045fe45..d926c7e888 100644
--- a/deps/python3/python3.cmake
+++ b/deps/python3/python3.cmake
@@ -53,12 +53,9 @@ if(WIN32)
         set(_python_pcbuild_output_dir win32)
     endif()
 
+    # pybind11 undefines _DEBUG around Python.h so a debug build links the
+    # release python3xx.lib; Py_DEBUG could not load release plugin modules.
     set(_python_pcbuild_config Release)
-    set(_python_layout_debug OFF)
-    if(DEFINED DEP_DEBUG AND DEP_DEBUG)
-        set(_python_pcbuild_config Debug)
-        set(_python_layout_debug ON)
-    endif()
 
     # CPython's PCbuild needs a 64-bit-hosted toolchain: find_msbuild.bat picks the
     # 32-bit Bin\MSBuild.exe, whose x86 cl.exe/link.exe run out of address space
@@ -101,7 +98,6 @@ if(WIN32)
             -DPYTHON_BUILD_DIR=<SOURCE_DIR>/PCbuild/${_python_pcbuild_output_dir}
             -DPYTHON_DEST_DIR=${DESTDIR}/libpython
             -DPYTHON_LAYOUT_ARCH=${_python_layout_arch}
-            -DPYTHON_DEBUG=${_python_layout_debug}
             -P ${CMAKE_CURRENT_LIST_DIR}/stage_windows.cmake
     )
 elseif(APPLE)
diff --git a/deps/python3/stage_windows.cmake b/deps/python3/stage_windows.cmake
index b127f06b68..758e0be9f3 100644
--- a/deps/python3/stage_windows.cmake
+++ b/deps/python3/stage_windows.cmake
@@ -9,9 +9,6 @@ foreach(_var PYTHON_SOURCE_DIR PYTHON_BUILD_DIR PYTHON_DEST_DIR PYTHON_LAYOUT_AR
 endforeach()
 
 set(_python_exe "${PYTHON_BUILD_DIR}/python.exe")
-if(PYTHON_DEBUG)
-    set(_python_exe "${PYTHON_BUILD_DIR}/python_d.exe")
-endif()
 
 if(NOT EXISTS "${_python_exe}")
     message(FATAL_ERROR "Built Python executable not found: ${_python_exe}")
@@ -49,22 +46,11 @@ endif()
 set(_required_files
     "${PYTHON_DEST_DIR}/Lib/encodings/__init__.py"
     "${PYTHON_DEST_DIR}/include/Python.h"
+    "${PYTHON_DEST_DIR}/python.exe"
+    "${PYTHON_DEST_DIR}/python${_python_abi}.dll"
+    "${PYTHON_DEST_DIR}/libs/python${_python_abi}.lib"
 )
 
-if(PYTHON_DEBUG)
-    list(APPEND _required_files
-        "${PYTHON_DEST_DIR}/python_d.exe"
-        "${PYTHON_DEST_DIR}/python${_python_abi}_d.dll"
-        "${PYTHON_DEST_DIR}/libs/python${_python_abi}_d.lib"
-    )
-else()
-    list(APPEND _required_files
-        "${PYTHON_DEST_DIR}/python.exe"
-        "${PYTHON_DEST_DIR}/python${_python_abi}.dll"
-        "${PYTHON_DEST_DIR}/libs/python${_python_abi}.lib"
-    )
-endif()
-
 foreach(_required_file IN LISTS _required_files)
     if(NOT EXISTS "${_required_file}")
         message(FATAL_ERROR "Staged Python file missing: ${_required_file}")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0036af0a8c..f0de57f12c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -33,7 +33,8 @@ if (SLIC3R_GUI)
         set (wxWidgets_CONFIG_OPTIONS "--toolkit=gtk${SLIC3R_GTK}")
         find_package(wxWidgets 3.3 REQUIRED COMPONENTS base core adv html gl aui net media webview)
     else ()
-        find_package(wxWidgets 3.3 CONFIG REQUIRED COMPONENTS html adv gl core base webview aui net media)
+        # propgrid is required by wxInspector.
+        find_package(wxWidgets 3.3 CONFIG REQUIRED COMPONENTS html adv gl core base webview aui net media propgrid)
     endif ()
 
     if(UNIX)
@@ -90,6 +91,16 @@ if (SLIC3R_GUI)
 #    list(REMOVE_ITEM wxWidgets_LIBRARIES oleacc)
 
     find_package(wxInspector REQUIRED)
+
+    # wxInspector's exported interface names the release wxWidgets import
+    # libraries, which a Debug build cannot link. wx is linked above instead.
+    get_target_property(_wxinspector_interface wxInspector::wxInspector INTERFACE_LINK_LIBRARIES)
+    if (_wxinspector_interface)
+        list(FILTER _wxinspector_interface EXCLUDE REGEX "wx(base|msw)3[0-9]u[_.]")
+        set_target_properties(wxInspector::wxInspector PROPERTIES
+            INTERFACE_LINK_LIBRARIES "${_wxinspector_interface}")
+    endif ()
+
     list(APPEND wxWidgets_LIBRARIES "wxInspector::wxInspector")
 
     message(STATUS "wx libs: ${wxWidgets_LIBRARIES}")
diff --git a/src/slic3r/plugin/PluginAuditManager.hpp b/src/slic3r/plugin/PluginAuditManager.hpp
index d6751a57fd..153f9d6107 100644
--- a/src/slic3r/plugin/PluginAuditManager.hpp
+++ b/src/slic3r/plugin/PluginAuditManager.hpp
@@ -1,7 +1,8 @@
 #ifndef slic3r_PluginAuditManager_hpp_
 #define slic3r_PluginAuditManager_hpp_
 
-#include <Python.h>
+// Via pybind11 so this file requests the same python3xx.lib as everything else.
+#include <pybind11/conduit/wrap_include_python_h.h>
 #include <memory>
 #include <mutex>
 #include <string>
diff --git a/src/slic3r/plugin/PythonInterpreter.hpp b/src/slic3r/plugin/PythonInterpreter.hpp
index ff69ce6846..e15aa91598 100644
--- a/src/slic3r/plugin/PythonInterpreter.hpp
+++ b/src/slic3r/plugin/PythonInterpreter.hpp
@@ -1,7 +1,8 @@
 #ifndef slic3r_PythonInterpreter_hpp_
 #define slic3r_PythonInterpreter_hpp_
 
-#include <Python.h>
+// Via pybind11 so this file requests the same python3xx.lib as everything else.
+#include <pybind11/conduit/wrap_include_python_h.h>
 #include <pytypedefs.h>
 #include <atomic>
 #include <functional>